Bytes - answers

Capturing equivalent file size given a String

sukatoa — Fri, 20 Nov 2009 15:47:32 GMT

Is there a way to capture the equivalent file size(text) given a String?

Any ideas?

P.S Except for saving the text into a file first before getting its file size...

Text Encoding and Decoding

EntryTeam — Fri, 20 Nov 2009 12:17:02 GMT

I'm trying to write ISO8859_8->UNICODE->ISO8859_8 translator (the simplest as possible), but application doesn't seem to work properly. Can you people, please, help me out?

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	import java.io.*; 
 
public class Main {
 
    public static void main(String[] args) throws IOException {
 
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

        String text = in.readLine();
 
        PrintStream out = new PrintStream(System.out, true, "UnicodeLittleUnmarked");

        out.println(    En_De_CODE.encode(text)    );

    }
 
}
 
class En_De_CODE {

    public static String encode(String s) throws UnsupportedEncodingException {

        // s = "איליה"; // ISO8859_8

        return new String(s.getBytes("UnicodeLittleUnmarked")); // to Unicode Little Endian

    }
 
    public static String decode(String s) throws UnsupportedEncodingException {

        // s = "Ilja";

        return new String(s.getBytes("ISO8859_8")); // to Latin/Hebrew

    }

}

run: (input and output)

Quote:

איליה
? ? ? ? ?

Jsp

naharol — Fri, 20 Nov 2009 10:34:59 GMT

I was always looking to create a registration page and a login page so whichever users visiting my website can create an account so that I can have some details about the user who is using on my website.

So, I wanted something like this >>

1. To create a registration form with the following fields:

Username
Password
Email Address
Address
Tel
Occupation
Hobbies

And then their should be 2 buttons at the end of the page -> Submit , Reset

Then when the user clicks on the Submit button, all of these details should be stored in a Database, say for e.g. wamp server PhpAdmin

After this, I wanted to create a Login page wherein a user enters his name and password and clicks on the Login button. As soon as he clicks on the Login button, the website should go to the database and match the username and password entered by the user with the data in the database (In other words, validating Username & Password with the database).

If his username and password matches, then he should successfully login into the website.

If his username does not match, then it should display a message, 'No such Username' and if his password does not match, then if should show a message 'Invalid Password' and provide a link to 'Forgot your Password' page.

Next, I want to create a Forgot your Password page wherein the User is asked to enter his username or email address and if it matches, then the password should be sent to his email address which was provided at the time of registration.
and he should be displayed a message that an email containing a password has been sent to his email address (The email address should be displayed where the password is sent)

Can any body help me out all this stuff using JSP.

Mp3 format for Java ???

desturrr — Fri, 20 Nov 2009 10:25:28 GMT

Is there any way to play mp3 file by using Java api? I strongly need to play mp3 files, because wav files are so big according to mp3 .

Thanks.

Sound for Java application ?

desturrr — Thu, 19 Nov 2009 21:07:46 GMT

I am planning to start writing an application by java. Let me tell what i have in my mind. There is going to be stave and client can input the notes for the song on the stave, as you know just like guitar pro. What i want to do is after composing these notes on a free stave, i have to play the notes but firstly i need to record the sounds , i searched about the sound file formats, the sound api for java supports wav files. If you know any program that is useful for recording small and quality wav sound records, please share with me.I may have 1 to 5 seconds records and nearly 300 sound record. Is it possible to make the program as an applet so that everyone can benefit from it? Or does it have to be an desktop app ?.I am rather new for this , but i believe i can write that program. Any help or Any source that may help is appreciated.Thanks.

By the way the instrument is http://en.wikipedia.org/wiki/Ney . (it is an excellent instrument :) )

probleme on service web with mysql

manjava — Thu, 19 Nov 2009 15:14:22 GMT

Hello,

i have a class java conncet to database mysql when i execute the classe alone so execute but when i want to execute this link on web :http://localhost:8080/ProjetService/...in/getMagasins
i done this error:
echec pilote :java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
echec connection a la bdd :java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/boutiquegeographique
erreur selectionjava.lang.NullPointerException
echec pilote :java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
echec connection a la bdd :java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/boutiquegeographique
erreur selectionjava.lang.NullPointerException
echec pilote :java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
echec connection a la bdd :java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/boutiquegeographique
erreur selectionjava.lang.NullPointerException
echec pilote :java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
echec connection a la bdd :java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/boutiquegeographique
erreur selectionjava.lang.NullPointerException
echec pilote :java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
echec connection a la bdd :java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/boutiquegeographique
erreur selectionjava.lang.NullPointerException
i use eclipse and axis2 and database mysql
thanks

Java code used to read data from barcode scanner or rs232 port

jeekesh — Thu, 19 Nov 2009 13:17:52 GMT

Hi
I am very new to java.
I have made one application for inventory mgmt.
I want some ready code to read data from barcode scanner or rs232 port.
If any of have such code than please help me

web service with mysql and axis

manjava — Thu, 19 Nov 2009 11:47:05 GMT

Hello,

if any one know how can deploy a web service with class java conncet to database mysql with axis and IDE eclipse please help me or done tutorail explain that

Thank you

IO Tools eclipse

mar11 — Wed, 18 Nov 2009 21:04:22 GMT

Hi,

i have some problems with passing values through keyboard in eclipse plattform.

if i import this code

import Prog1Tools.IOTools;

i got this error : The import Prog1Tools cannot be resolved

what can i do to be able to insert data through keyboard ??

where can i doenload this packge?

any help is welcame....

How to get mime type of a document from the Byte array using Java?

bharath652 — Wed, 18 Nov 2009 08:46:49 GMT

Hi,

I need to know how to get the Mime type of a Document from the Byte array. I'm not having file name of file extension. I have only Byte array of a document.

To be more specific, Using the binary of a docuement, I need to find whether it is MS Word or MS Excel and so on.

Please tell me is there a way to find it in Java.

Thanks in advance
Bharath

ftp vs sftp in JAVA

ndedhia1 — Tue, 17 Nov 2009 19:16:26 GMT

I was hoping you could help me out with ftp vs sftp.
Below is a method that I have that I call to ftp files from one unix box
to another in house, but soon, we will have to ftp from here to NY so we
have to start using sftp. I know that we have open ssh on our unix
boxes but was wondering how different the syntax would be, going from
ftp to sftp.

Here is a method that I have written in my java code for ftping a file
to a specific location.
How can I change this so that it will sftp instead of ftp?
Do I need to change this line frome ftp to sftp and thats it:
URL("ftp://"+user+":"+password+"@"+host+".sbc.com:21/%2F"+remoteDirFile

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ftpFile("upload","login","passwd","unixbox",remote,"",m_spreadName,"i");

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private void ftpFile(String actionType,String user,String

password,String host,String remoteDirFile,String remoteFILE,String

localeFile,String modeType)

    {

     //modeType='a' for ascii || 'i' for binary
 
      if(actionType.equalsIgnoreCase("download"))  ///Download a file

      {

       try

       {

          URL url = new

 URL("ftp://"+user+":"+password+"@"+host+".sbc.com:21/%2F"+remoteDirFile

 +";type="+modeType);
 
          URLConnection conn = url.openConnection();
 
          PrintWriter ot = new PrintWriter(new FileWriter(localeFile));

          BufferedReader in = new BufferedReader(new

InputStreamReader(conn.getInputStream()));

          String line="";
 
          while((line = in.readLine()) != null)

          {

              ot.println(line);

          }
 
        ot.close();

        in.close();
 
       }

       catch (MalformedURLException m)

       {

          System.out.println(" Error: "+m);

       }

       catch (IOException ioe)

       {
 
         System.out.println(" Error: "+ioe);

         String weekDay = convertToValidWeekDay(determineValidWeekDay((new GregorianCalendar().get(Calendar.DAY_OF_WEEK + day--))));
 
         if(day < -7)

         {

           System.out.println(" No valid file(s) to "+actionType);

         }
 
         String remoteDirFile2="/production/"+weekDay+"/dir2/"+

 remoteFILE;
 
//ftpFile(actionType,user,password,host,remoteDirFile2,remoteFILE,locale File,modeType);

       }

      }

     else if(actionType.equalsIgnoreCase("upload"))  ///Upload a file;

Only binary files

      {

        try

        {

            URL url = new

URL("ftp://"+user+":"+password+"@"+host+".sbc.com:21/%2F"+remoteDirFile

); //'a' for ascii and 'i' for binary
 
            URLConnection conn = url.openConnection();

            OutputStream os = conn.getOutputStream();

            BufferedInputStream bis =  new BufferedInputStream(new

FileInputStream(localeFile));

            int number;
 
            while((number = bis.read()) != -1)

            {

              os.write(number);

              os.flush();

            }
 
            os.close();

            bis.close();
 
       }

       catch (MalformedURLException m)

       {

         System.out.println(" Error: "+m);

       }

       catch (IOException ioe)

       {

          System.out.println(" Error: "+ioe);

       }

      }

    }

Sending an Object through Socket

sukatoa — Tue, 17 Nov 2009 17:11:02 GMT

Good day,

I have an object, that contains a hashmap, that is dynamically utilized on client and server data transfer. that object may contain a string, an arraylist, or an object itself.

Based on the observation, i found out that, when the database will be reset, the client could still able to send the reliable data(through showing on the stream - println) but when the server received it, the essential list of data have lost.

What can you advice about this scenario?

Im looking forward to your replies experts :)

java or .net

swapnilb1 — Tue, 17 Nov 2009 06:30:01 GMT

Hi to all friends,
I am working on c,c++,vc++ for 1 year.Now i want to move from c++ to another technology like java/.net

I learned both technology(java & .net) during my CDAC 1 yr ago, & I am good in core java but not so in j2ee while about .net I am good in asp.net but not so in c#/vb.
And another scenario is that ,though I love Java...in india (i am in India Pune) for 1+ yr of exp there are lot opportunities in dotnet but for Java/J2ee opportunities are for 2+/3+ yr of exp...

I am confused...
Plz give your valuable suggation..

Please help me to modify my code...

alireza6485 — Tue, 17 Nov 2009 04:56:40 GMT

Hi,
I have the following code,it prints out a 5 by 5 matrix and puts "-" in each location.
I need to ask user for the number of * they like to put in the matrix and based on the number they enter replace a random "-" by a "*".
It would be great if you modify my code and help me:
Here is an example:
How many * you want in the matrix?
3
-*---
*----
----*
-----
-----

import java.io.*;
import java.util.*;

class TestRandomArray1 {
private String [][] mBoard; // Good for a two-dimensional world
private int mDimension; // the size of the board
public TestRandomArray1(int dimension) {

mDimension = dimension;
mBoard = new String[mDimension][mDimension];
for (int i = 0; i < mBoard.length; i++)
for (int j = 0; j < mBoard[i].length; j++)
mBoard[i][j] = "-";
}

public void display() {

for (int i = 0; i < mBoard.length; i++) {
for (int j = 0; j < mBoard[i].length; j++)

System.out.print(mBoard[i][j]);

System.out.println();
}

}
public static void main(String[] argv) {

TestRandomArray1 runATest = new TestRandomArray1(5);
runATest.display();
}
}

C to Java...

alireza6485 — Tue, 17 Nov 2009 03:00:57 GMT

Hi,
Could sme one please translate the following code from C to Java for me?

Code :
/*
Polytechnic University of the Philippines
Sta.Mesa, Manila
College of Computer Management and Information Technology

A
CASE STUDY
in
DATA STRUCTURES
AND
ALGORITHM

*/
#include
#include
#include
#include
#include

#define MAXROW 15
#define MAXCOL 30

#define ALIVE 1
#define DEAD 0

struct conway{
int organism;
int neighbor;
}cell[MAXROW+2][MAXCOL+2];

void twolinebox(int x1,int y1,int x2,int y2){
int x,y;
gotoxy(x1,y1); printf("�"); //alt-201
gotoxy(x2,y1); printf("�"); //alt-187
for(y=y1+1;y gotoxy(x1,y); printf("�"); //alt-186
gotoxy(x2,y); printf("�"); //alt-186
}
gotoxy(x1,y2); printf("�"); //alt-200
gotoxy(x2,y2); printf("�"); //alt-188
for(x=x1+1;x gotoxy(x,y1); printf("�"); //alt-205
gotoxy(x,y2); printf("�"); //alt-205
}
gotoxy(x1+1,y1+1);
}

void printxy(int x,int y,char string[]){
gotoxy(x,y); printf("%s",string);
}

void center(int y,char string[]){
int x=(80-strlen(string)+1)/2;
gotoxy(x,y);printf("%s",string);
}

void initializeMatrix(void){
int row,col;
for(row=-1;row for(col=-1;col cell[row][col].organism=DEAD;
cell[row][col].neighbor=0;
}//end of inner for loop
}//end of outer for loop
}//end of initializeMatrix

void showMatrix(void){
int row,col;
twolinebox(1,1,80,24);
for(row=0;row for(col=0;col gotoxy(5+col,5+row); printf("�"); //alt-178
if(cell[row][col].organism==ALIVE){
gotoxy(5+col,5+row);
printf("%c",cell[row][col].organism);
}//end of if
}//end of inner for loop
}//end of outer for loop

}//end of showMatrix

void inputOrganism(void){
int org,row,col,err,a;
initializeMatrix();
do{
clrscr();
showMatrix();
gotoxy(5,3); printf("Input no. of organism to display(1-30
only):
");
gotoxy(50,3); scanf("%d",&org);
}while(org<1||org>30);

for(a=1;a<=org;a++){
clrscr();
showMatrix();
do{
do{
gotoxy(36,6); printf("Input cell row position of organism %d",a);
printxy(36,7,"row:(1-15)only\> ");
gotoxy(55,7); scanf("%d",&row); row--;
}while(row>15||row<0);
do{
gotoxy(36,9); printf("Input cell column position of organism
%d",a+1);
gotoxy(36,10); printf("col:(1-30)only\> ");
gotoxy(55,10); scanf("%d",&col); col--;
}while(col>30||col<0);
if(cell[row][col].organism==ALIVE){
gotoxy(36,20); printf("cell[%d][%d] is already
occupied!",row+1,col+1);
gotoxy(36,21); printf("Try other cell...");
getch();
gotoxy(36,20); clreol();
gotoxy(36,21); clreol();
}//end of if
}while(cell[row][col].organism==ALIVE);
cell[row][col].organism=ALIVE;
showMatrix();
}//end of for loop

}//end of inputOrganism

void checkCell(void){
int row,col;

//in this part the neighboring cells are checked,
//if the neighborng cell is an occupied cell
//then the neighbor element of the structure cell is increased by 1

for(row=0;row for(col=0;col cell[row][col].neighbor=0; //initialize neighbor to 0
if(cell[row-1][col-1].organism==ALIVE)
cell[row][col].neighbor++;
if(cell[row-1][col].organism==ALIVE)
cell[row][col].neighbor++;
if(cell[row][col-1].organism==ALIVE)
cell[row][col].neighbor++;
if(cell[row][col+1].organism==ALIVE)
cell[row][col].neighbor++;
if(cell[row+1][col].organism==ALIVE)
cell[row][col].neighbor++;
if(cell[row+1][col-1].organism==ALIVE)
cell[row][col].neighbor++;
if(cell[row-1][col+1].organism==ALIVE)
cell[row][col].neighbor++;
if(cell[row+1][col+1].organism==ALIVE)
cell[row][col].neighbor++;
}//end of inner for loop
}//end of outer for loop

//in this part we will check the cell's no. of neighbor then
//place or kill organism in that particular cell
//based on its neighboring cell according to Conway's Rule

for(row=0;row for(col=0;col if(cell[row][col].organism==ALIVE){ //rule2 and 3 if and occupied
cell
if(cell[row][col].neighbor<2) //rule2: has less than 2 neighbor
cell[row][col].organism=DEAD; //organism will die in that cell
else if(cell[row][col].neighbor>3) //rule3: has greater than 3
cell[row][col].organism=DEAD; //organism will die in that cell
}
else //if(cell[row][col].organism!=1) //rule1. if an empty cell
if(cell[row][col].neighbor==3) //has exactly 3 neigbor
cell[row][col].organism=ALIVE; //an organism is born in that cell

}//end of inner for loop
}//end of outer for loop

}//end of checkCell

void showGeneration(void){
int gen,g;
clrscr();
showMatrix();
gotoxy(5,3); printf("Enter no. of generation you want to
see...");
gotoxy(5,4); printf("gen:\> ");
gotoxy(12,4); scanf("%d",&gen);
for(g=1;g<=gen;g++){
clrscr();
showMatrix();
gotoxy(36,10); printf("GENERATION %d",g);
checkCell();
getch();
}//end of for loop
}//end of showGeneration

void welcome(void){
clrscr();
twolinebox(1,1,80,24);
gotoxy(35,8); printf("WELCOME");
gotoxy(37,10); printf("to");
gotoxy(35,12); printf("CONWAY'S");
gotoxy(36,13); printf("GAME");
gotoxy(38,14); printf("of");
gotoxy(37,15); printf("LIFE");
gotoxy(26,23); printf("press any key to continue...");
getch();
clrscr();
twolinebox(1,1,80,24);
center(3,"CONWAYS GAME OF LIFE");
printxy(5,5,"RULE OF THE GAME");
printxy(5,7,"If in one generation,");
printxy(10,8,"an empty cell has exactly three neighboring cells
containing");
printxy(10,9,"organisms, then a new organism is born in that
cell
in the ");
printxy(10,10,"next generation.");
printxy(5,11,"If in one generation,");
printxy(10,12,"an organism has fewer than two neighboring cells
containing");
printxy(10,13,"organisms, then it dies from isolation before
the");
printxy(10,14,"next generation and its cell become empty.");
printxy(5,15,"If in one generation,");
printxy(10,16,"an organism has more than three neighboring cells
containing");
printxy(10,17,"organisms, then it dies from overcrowding before
the");
printxy(10,18,"next generation and its cell become empty.");
printxy(5,19,"All other organisms survive unchanged to the next
generation.");
center(21,"Press any key to continue...");
getch();
}

void quit(void){
clrscr();
twolinebox(1,1,80,24);
center(7,"PROGRAMMED");
center(8,"BY");
center(9,"BSCS 2-2");
center(11,"Frederick Badion");
center(12,"Michelle Baylon");
center(13,"Kirby Adriano");
center(14,"Jamil Soller");
center(15,"Sweet Joan Zamora");
getch();
}

void main(){
char opt;
textmode(BW80);
do{
clrscr();
welcome();
inputOrganism();
showGeneration();
gotoxy(5,22);
printf("Try again? [Y/N] ");
opt=getch();
}while(toupper(opt)=='Y');
quit();
exit(1);
}//end of main